Cluebat aka Clue-by-four

[ Usenet: portmanteau, clue + two-by-four ]
The notional stick with which one whacks an aggressively clueless person.
This term derives from a western American folk saying about training a
mule "First, you got to hit him with a two-by-four. That's to get his
attention." The clue-by-four is a close relative of the LART. Syn. clue
stick. This metaphor is commonly elaborated; your editor once heard a
hacker say "I smite you with the great sword Cluebringer!"